Furnace.



A. NILSdN.

' FURNACE.

APPLICATION FILED 18.14. I916.

1,221,082. Patented Apr. 3,1917.

z SHEETS-SHEET 1. [2371 69%].74655615: flaw/7X57" 0 4% I r ai/zdrewfl iawv A. NILSON.

FURNACE.

APPLICATION FILED F'EB.14. I916- Patented Apr. 3, 1917.

2 SHEETSSHEET 2.

ANDREW NILSON,

OF CHICAGO, ILLINOIS, ASSIGNOR TO THE EUREKA SMOK ELESS FURNACE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FURNACE.

Lac ose.

Specification of Letters Patent.

PatentedApr. 3, 1M7.

Application filed February 14, 1916. Serial No. 78,689."

To all whom it may concern:

Be it known that I, ANDREW NILSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented'a certain new and useful Improvement in=Furnaces, of which the following is a full, clear, concise, and exact description, referencebeing had to the accompanying drawings, forming a part of this. specification.

My invention relates to furnaces and has for its object the provision of an improved structure thereof by virtue of which economiesincoal consumption may be effected. M yi'nvention among other things concerns itself primarily with a suitable distribution of air and combustible gases, and concerns itself with their suitable intermixture.

Furnaces constructed in accordance with my invention are practically self-regulating or automatic in their nature, supplying the right amount of air to thoroughly combust the gases given off from the coal or fuel, thus preventing loss and at the sametime 35 almost entirely eliminating smoke; for practical purposes it maybe said that the smoke is entirely eliminated. j

1 My invention maybe applied to furnaces for heating buildings or to furnaces of other characteristics, but in this present application I am describing a furnace used for heating purposes which is constructed in accordance with my invention. I will describe such a particular form which my invention may takein connection with the ac: companying drawings, in which- Figure 1 is a'longitudinalsectional view of a furnace constructed in accordance with my invention;

Fig. 2 is a sectional view on line a-a of Fig. 1;

Fig. 3 is a sectional view on line 6-6 of I Flg. 1;

Fig. 4 is a sectional View on line c-c of L5 Fig. 2;

Fig. 5 is a sectional Fig. 1, and a Fig. 6 is a detail perspective view of the arch or bafiie wall support.

0 My furnace as here illustrated has the side walls 1 and 2, the upper arch 3 and the boiler portion 4. The furnace proper is divided into a fire box 5, and combustion chamber 6, which are separated by a baflie 5 wall structure 7 which extends kv iew on line of to the rear clearly shown in Fig. 1. Thefurnace nels by which the air across the full width of the furnace and extends downwardly to about the top of what would be the normal height of the coal or fuel 8, thus leaving an opening 9 under this bafiie wall, which opening extends the full width of the furnace between the elements 10 and 11. This opening 9, as stated, isnormally substantially closed bythe fuel 8,-the top of the fuel sloping downwardly immediately of this bafiie wall as is most is of course provided with any customary style of. grate 12 and suitable grate operating handle 13 which permits the dumping of the ashes from the fire box into the ash pit or ash pan 14. A suitable door 15 permits access from the front to the ash pit'and this door may of course be opened or closed 'in any regulatory manner-es may be desired. The fire box is also provided With' suitable 1 doors 16 as is readily understood.

In addition tov the baflie Wall structure,

which will be more clearly explained herein after, my novel furnace also includes means for supplying air to the front part of the fire box, which air may be suitably obtained from anywhere, but which in the particular construction herein shown is obtained from the ash pit, and thus in a measure helps the self-regulating qualities of the furnace.

These means for supplying air to the front, of the furnaceconsist of hood elements 17 which may rest upon the side member 18 of the grate and which at the top may rest against the side wall of the furnace,- which in this case is the wall of the Water leg 19,

allas more clearly apparent from Fig. 5.

These hood'members 17 thus provide chanmay come from the ash pit 14 (Fig. 5) into this channel formed by the elements 17 and thence through openings 20into the fire box, all as shown by the arrows more clearly in Figs. 5, 1 and 2. Itv is thus seen that a fresh supply of air whichis used to mix with the uncombusted gases driven from the coal is'thus supplied to the furnace and by suitably intermingling assists to complete the combustion and to providefor a complete combustion of all of the particles so as to prevent smoking. This supply of air assists, for instance, in thoroughly combusting the thick volumesof uncombusted matter which rise' from the coal immediately the furnace is fired or filled with a fresh supplyof coal or fuel.

In addition, my invention has for one of its objects, as before stated, the constructionof the bafile wall structure 7 which has been partly described in'such a way that this baflie wall structure includes a pair of channel elements 10 and 11, which, as shown more clearly in Fig. 3, rest upon the side bars 18 of the structure'and thus provide a duct or channel from which air may. pass from the ash pit 14 (as shown by the arrowsin Fig.3) directly upwardly through said duct and into the hollow bafile wall structure. This hollowbaflle wall structure is supported preferably by two pipes 21 and 22' which extend'preferably through the side walls ofthe furnace and which form supports for the front wall 23 and rear wall 24 of this hollow baflle wall structure, The channel elements 10 are provided with holes 25,25- to accommodate-the pipes 21 and 22, which pipes however, as readily apparent,-are entirely inclosed serving merely as supporting "and 22 isleft open'as' shown more 26 I center and needing more air than atthe sides. The brick structure consisting of the walls 23 -and 24 is carried upwardly to the topwall of the furnace, thus closing it entirely at the top as is clearly apparent from Figs. 1 and 2, the top wall of the furnace proper being represented at 27.5 c r Included in the hollow wall structure is. a preferably metallic portion 28 which carries the doors 29 and 29 which may be used for cleaning purposes. This metallic structure also provides openings 30, 30 into which the mixture from the firebox may enter and pass downwardly into the interior 31 of the hollow arch, as shown more clearly by the arrows inFigs. 1, 2, 3 and 4. An enlarged opening 32 is provided as shown more clearly in Figs. 3 and 4 to assist in the passage of the mixture into the interior of the hollow arch. The mixture from the fire box may then pass into the hollow arch and out through the bottom thereof, as shown more clearly by the arrows of Fig. 4, and from there pass, into the combustion chamber where the'heat is intense and where these uncombusted' gases and mixtures burn in a manner to provide complete combustion. Additional air is of course supplied also to the interior of the hollow arch, this air pass- ,ingupwardly through the d'ucts .10 and 11. As before stated, the air 'which passes through the ducts 10, 11 and 17 is taken from the ash pit. Furthermore the fuel does not those skilled in the art.

said baflle wall having openings to the passage of gases from the fire 0x to the combustion chamber, means for supplyash pit.

- the. fire entirely cover the entire surface'of the grate which forms the lower wall of the combustion chamber 6, and thus' additional air passes upwardly from the ash pit into the combustion chamber.

From what has been described the nature of my invention will be readily clear to Having however thus described one form which my invention may take, what I claim as new and desire to secure by LettersPatent is 1. A furnace structure having a fire box,

combustion chamber and ash pit, a, baiilev wall structure interposed between said combustion chamber and fire box, a grate underneath both fire box and combustion chamber, said bafiie wall having openings to permit the assage of gases from the fire box to the com ustion chamber, means for supplying fresh air for mixing with the gases mimediately to the rear of said openings, and means for supplying fresh air to the front portion only of said fire box above the grate.

2. A furnace structure having a-fire box, combustion chamber and ash pit, a bafile wall structure interposed between said combus-- tion chamber and fire box, a grate underneath both fire box and combust1on chamber, ermit ing fresh air for mixing with the gases immediately to the rear of said opemngs, and means for supplying fresh. air to the front portion only of said fire box above the rate both of said means communicating wit said 3. A furnace structure having a fire box, combustion chamber and ash pit, a bafile wall structure interposed between said combustion chamber and fire box and extending downwardly to the normal top level of the fuel, a grate underneath both fire box and combust1on chamber, said baffle wall having openings to permit the passage of gases from box to the combustion chamber, means for supplying fresh air for mixin with the gases immediately to the rear 0 said openings, and means for supplyin' fresh air to the front portion only of said fire box above the grate.

4. A furnace structure having a fire box, combustion chamber and ash pit, a bafile wall structure interposed between said combustion chamber and fire box and extending downwardly to the normaltop level of the fuel, said bafile wall having openings to permit the assage of gases. from the fire box to the com ustion chamber, means for supplying fresh air for mixing with the gases immediately to the rear .of said openm and means for supplying'fresh air to tie front portion only of said fire box above the grate, both of said means communicating with said ash pit.

5. A furnace structure h'avin a fire box,

combustion chamber and ash plt, a hollow,

bafiie wall structure inter osed between said combustion chamber an fire box and extending downwardly apfproximately to the,

underneathboth the box and combustion.

chamber, a hollow bafile wall structure interposed between said combustion chamber and fire box, said bafile wall having openings leading from said fire box into its hollow interior, means forsupplying air to the interior of said ballie wall, means for directing the mixture from the interior of said bafiie 2 wall into the combustion chamber, and means for supplying air to the front ortion onl of said fire box above the gratis y 7. A furnace structure having a firebox, combustion chamber and ash pit, a grate underneath both fire box and. combustion chamher, a hollow bafile wall structure interposed between said combustion chamber and fire box, said bafile wall having openings leading from said fire box into its hollow interior,

means for supplying airto the interior of said baflle wall, means for directing the mixture from the interior of'said ba-flle wall into the combustion chamber, land" means for supplying air to the front portion only of said firebox above the grate, both of said air supplying means communicating with said ash pit.

' 8. A furnace structure having a fire box,

combustion chamber and ash pit, a bafile wall structure interposed between said combustion chamber and fire box, a grate underneath both fire box and combustion chamber,

said .baffle wall having openings to permitthe passage of gases om the fire box to the combustion chamber, means for supplying fresh air for-mixing with the gases 1mmediately to the rear of said openings, and 1 means'for supplying fresh air to the front portion only 0 said last aforesaid means consisting of a hollow element extending upwardly from said grate at the front portion of said fire box, and having holes through its side Wall leadsaid fire box above the grate,-

in from the interior- 0f said element to said fire box. 7

In witness whereof, I hereunto subscribe my name this 10th day of February, A. D. 1916.

ANDREW NILSON Witnesses:

A. LYDA Jones,

HAZEL A. JoNEs.

Wopiea of this patent may be obtained for ave cents each, by addressing the "commissioner of Patents, Waahingt'on, D. 0. 

